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VQT5K75
Troubleshooting
Before requesting service, make the following checks.
If you are in doubt about some of the check points, or if
the solutions indicated do not solve the problem, consult
your dealer for instructions.
The unit does not work.
• One of the unit’s safety devices may have been
activated.
Reset the unit as follows:
1 Press [Í/I] on the main unit to switch the unit to
standby.
• If the unit does not switch to standby, press [Í/I]
on the main unit for a few seconds. The unit is
forcibly switched to standby. Alternatively,
disconnect the AC power supply cord, wait one
minute, then reconnect it.
2 Press [Í/I] on the main unit to switch it on. If the
unit still cannot be operated, consult the dealer.
The display panel lights up and changes
continuously in standby mode.
• Press and hold [∫] on the main unit to select “DEMO
OFF”.
No operations can be done with the remote control.
• Examine that the battery is installed correctly.
Sound is distorted or no sound.
• Adjust the volume of the system.
• Switch off the system, determine and correct the
cause, then switch the system on again. It can be
caused by straining of the speakers through excessive
volume or power, and when using the system in a hot
environment.
A humming sound can be heard during playback.
• An AC power supply cord or fluorescent light is near
the cables. Keep other appliances and cords away
from the cables of this system.
The sound level reduces.
• The protection circuit has been activated due to the
continuous use at high volume output. This is to
protect the system and maintain the sound quality.
Display not shown correctly.
Playback does not start.
• You have not put in the disc correctly. Put it in correctly.
• Disc is dirty. Clean the disc.
• Replace the disc if it is scratched, warped, or
non-standard.
• There is condensation. Let the system dry for 1 to
2hours.
The total number of tracks displayed is incorrect.
The disc cannot be read.
Distorted sound is heard.
• You put in a disc that the system cannot play. Change
to a playable disc.
• You put in a disc that has not been finalized.
The USB device or the contents in it cannot be read.
• The format of the USB device or the contents in it
is/are not compatible with the system.
• USB devices with storage capacity of more than 32 GB
cannot work in some conditions.
Slow operation of the USB device.
• Large content size or large memory USB device takes
longer time to read.
Sound is distorted.
• Use an optional FM outdoor antenna. The antenna
should be installed by a competent technician.
A beat sound is heard.
• Switch off the TV or move it away from the system.
• When in AM tuner mode, select from “BP 1” to “BP 4”
that provides the best reception.
A low hum is heard during AM broadcasts.
• Move the antenna away from other cables and cords.
Pairing cannot be done.
• Check the Bluetooth
®
device condition.
The device cannot be connected.
• The pairing of the device was unsuccessful.
Do pairing again.
• The pairing of the device has been replaced.
Do pairing again.
• This system might be connected to a different device.
Disconnect the other device and try pairing the device
again.
The device is connected but audio cannot be heard
through the system.
• For some built-in Bluetooth
®
devices, you have to set
the audio output to “SC-MAX770” manually. Read the
operating instructions of the device for details.
Sound from the device is interrupted.
• The device is out of the 10m communication range.
Move the device nearer to the system.
• Remove any obstacle between the system and the
device.
• Other devices that use the 2.4 GHz frequency band
(wireless router, microwaves, cordless phones, etc.)
are interfering. Move the device nearer to the system
and distance it from the other devices.
• Select “MODE 1” for stable communication.
The One-Touch Connection (NFC feature) is not
working.
• Make sure the unit and the NFC feature of the device are turned
on. (>13)
Common problems
Disc
USB
Radio
Bluetooth
®
SC-MAX770PU_eng.book 17 ページ ２０１４年３月６日 木曜日 午後２時５４分